Insulating-joint.



F, D. SAYLOR.

INSULATING JOINT.

APPLICAHON FILED SEPT. 9. 1914.

Patented J 1111626, 1911 2 SHEETS-SHEET I.

INVENTOR L WF MQW F. D. SAYLUR.

INSULATING JOINT.

APPLICATION FILED SEPT-9.1914.

Patented June 26,1917.

2 SHEETSSHEET 2- wrms sszs a FRANK D. SAYLOR, F PITTSBURGH, PENNSYLVANIAINSUIiATING-JOINT.

Specification of Letters Patent.

Patented J une 26, 1917.

Application filed September 9, 1914. Serial No. 860,886.

To all whom it may concern:

Be it known that I, FRANK D. Sarnora'a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inInsulating-Joints, of which the following 1s a specification.

My invention consists of an improvement in insulating joints forfixtures, chandeliers or the like, and is particularly adapted toprovide a fixture for supporting either electric or gas lamps, or both.

The particular object in view vide, in a fixture of such type, a strong,rigid, insulating joint construction in which the ends of pipe conduitsmaybe connected by screw joints, so as to provide for gas circulationwhen desired,.and a positive insulation against ground circuits or otherelectrical connection.

The improvement comprises, in such a' is to projoint, a metal bushingfor each of the pipes,

having threaded connection therewith, an intervening and outersurrounding insulating body fixedly holding the several parts inposition, and an outermost reinforcing and protecting shell or coping,the several parts being arranged and adapted for threaded adjustment andtightening, and adapted to carry out the objects in view, as hereinaftermore fully described.

In the drawings, which show preferred forms of the invention,- Y

Figure 1 is a vertical sectional view through one form of joint,indicated by the section line II. II. of Fig. 2.

' Fig. 2 is a plan view of Fig. 1, partly broken away at .one side.

Figs. 3 and 4 are views similar to Fig. 1, showing modifiedconstructions.

Referring to the construction of Figs. 1 and 2, the pipes 2 and 3, whichserve as the main supporting members of the fixture, and as conduits forthe gas, when used, are each provided with innermost threaded tenninals,as shown. Pipe 2 is tapped into a bushing 4, and pipe 3 into a similarbushing 5, each of which is provided with confronting flanges 6, 7,respectively.

These flanges are referably polygonal in form, as octagonal, or thepurpose of turning them by a suitable wrench to the desired degree, soas to effect alinement of the .55 several polygonal edges of theflanges, and

of the'in rvening in ulati g body, Said body, indicated by the numeral8, intervenes between the telescoping portions of bushings 4 and 5, asshown, each of which has threaded engagement with the insulating body 8,as at 9 and 10 respectively.

The insulating body with a flange 11, preferably polygonal,corresponding to flanges 6 and 7, between which it is tightly gripped.Body 8 is of any suitable insulating material as condensite or the like,sufliciently hard and strong to be tapped and to effect substantialthreaded connection between the connected bushings 4 and 5.

Between the said bushings is inserted a washer 12 of mica or othersuitable insulat- 8 is also provided ing-material, positively separatingelectrically the two bushings, in addition to the insulating bushing orbody 8. Said washer is provided with a central opening for circulationof gas, which may be provided originally or punctured as needed.

For the purpose of fixedly clamping the several parts in position, Iemploy a surrounding sealing body or ring 13 of insulating material, ascondensite, which is pressed or molded within an outermost surroundingprotecting ring or housing 14.

Said ring, as shown, engages by one of its end portions 15, outwardlyaround the flange 7 of bushing 5, and is rounded upwardly and outwardlybeyond the flanges 6 and 11, as shown, the insulating material 13 beininserted between the ring or casing 14 and the several flanges,completely covering and protecting these parts, with the ring, andeffectually insulating them from exterior contact.

In Fig. 3, the bushings 4 and 5are similarly provided with interiorthreaded terminals for the pipes 2 and 3, and also with the flanges 6and 7", described.

Between these bushings is embraced the insulating bushing 8 having thecentral and the oppositely extending threaded terminals for engagementwith the bushings 4 and 5- exteriorly, and the pipes 2 and 3*interiorly, as shown.

The central portion of the bushing 8 is preferably provided with aperforated opening 15 as shown, for circulation of gas, as described, orsuch an opening may be bored when needed.

Surrounding the several bushings and their flanges is the body ofinsulatingmaterial 13, within the outermost protecting of polygonalform, as

and inclosing ring 14, of partly spherical form, as shown, whereby tocompletely inclose the insulating material and protect the several partsin the same manner as above described.

In Fig. 4 the pipes 2 and 3 are screwed into bushings 4? and 5 which inturn have threaded engagement, as at 10*, with the surrounding andintervening bushing 8 of condensite or other suitable insulatingmaterial. In such construction, the bushings 4" and 5* being spacedapart, and separated by the insulating material 8", as shown, there isno necessity for the supplemental mica washer 12 of Fig. 1. Bushings 4:and 5 are provided with. polygonal flanges 6 and 7 for turning by aWrench, and each bushing is preferably centrally apertured,

as at b, for circulation.

An outermost protecting shell 1.4: embraces the insulating body 8*,additional insulation 8 being also inserted within the terminals of theshell and engaging and surrounding the flanges 6 7 fixedly holding themagainst movement.

With either construction it will be seen that I provide for screwengagement between the pipes, their bushings, and the associated body ofinsulating material. This is of especial advantage in assembling thefix-- ture and in insuring tight, firm connection of the several parts,also facilitating connection and disconnection of the pipes.

Also, in each, the connected parts are surrounded or embraced by theinsulating material and the outer rounded shell, firmly and positivelyengaging and holding the polygonal flanges against displacement, andproviding a complete outer protecting in-' sulation and armor.

The device may be variously changed or modified in construction, designor various details by the skilled mechanic, but all such changes are tobe considered as within the scope of the following claims.

What I claim is:

1. An insulating coupling consisting of a plurality of threaded metallicbushings in tandem each having a central threaded opening providing fora pipe connection at each end of the coupling and each bushing having anexternal flange, an intervening insulating member having threadedengagement with said bushings, and an outer insulating body.

2. An insulating coupling consisting of a plurality of threaded metallicbushings in tandem providing for a pipe connectlon at each end and eachhaving a polygonal flange,

.an intervening insulating member having threaded engagement therewith,an outer insulating body, and a surrounding shell.

'3. An'insulating coupling consisting of a intervening insulating memberconnecting the metallic bushings by threaded engagement and extendingtherebeyond by an outer insulating body portion embracing said flangedportions, and an outermost rounded protecting casing embracing theextended portion of the insulating member.

5. In an insulating coupling of the class described, the combination ofa plurality of spaced threaded bushings in tandem having terminalflanges, and a body of insulating material having threaded engagementwith said bushings and embracing the flanges thereof.

6. In an insulating coupling of the class described, the combination ofa plurality of spaced threaded bushings in tandem having terminalpolygonal flanges, and a body of insulating material having threadedengagement with said bushings and embracing the flanges thereof.

7. In an insulating coupling of the class described, the combination ofa plurality of spaced threaded bushings in tandem having terminalflanges, a body of insulating mate rial having threaded engagement withsaid bushings and embracing said flanges, and an outer shell inclosingthe insulating material and having inwardly deflected terminals sur--rounding the flanges and the insulating material therearound.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

FRANK D. SAY'LQR.

